Line 88 of '/home/andy/git/other/ast/src/cmd/std/seq.sh'
  		[[ $fmt == *%*([^[:space:][:alpha:]])[efg]* ]] || err_exit "$fmt: invalid format string"
  		              ^
---
Line 88 of '/home/andy/git/other/ast/src/cmd/std/seq.sh'
  		[[ $fmt == *%*([^[:space:][:alpha:]])[efg]* ]] || err_exit "$fmt: invalid format string"
  		^~
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